Joe Biden went to a small event and said "Good afternoon everyone. Welcome to the Kingswood community center. Actually, that's the one down where I used to work. That's a joke. I didn't know where we were."
This is a joke that we've been making for ages about him, because he sometimes says he's one place, but he's at another. Now he's making jokes about it to get ahead of the game! Uh oh, we better step up our game now!!